John Voelcker Jul 28, 2017 Follow John Add to circle Volkswagen TDI 'clean diesel' television ad screencap Enlarge Photo VW Group of North America now owns hundreds of thousands of Volkswagen and Audi TDI diesel vehicles it has bought back from owners under the terms of various diesel emission scandal settlements. Yesterday, it got some very good news: the EPA has approved a modification that will it allow it to resell the oldest and dirtiest of those vehicles. Known as "Generation One" diesels, they use the old EA189 2.0-liter turbodiesel engine but were not built with the modern urea-injection emission treatment system. DON'T MISS: EU investigating diesel collusion among Audi, BMW, Mercedes, Porsche, VW: report Analysts had largely expected this group of cars to be unfixable, due to the lack of a urea tank and other elements of the selective catalytic reduction system us...